Glossary

This glossary provides definitions for many of the terms you can see while using the installation documentation. Although the majority of terms are related to the installation environment, you also will find other common terms related to the applications that are used to set up a system for general use after a Full Installation.

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Special Characters

/

See root

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A

Advanced File System

See AdvFS (Advanced File System)

AdvFS (Advanced File System)

A journaled, local file system that provides higher availability and greater flexibility than traditional UNIX file systems. Using transaction journaling, AdvFS recovers file system integrity in seconds, rather than minutes, after an unexpected restart such as a power failure.

AdvFS journaling also provides increased file system integrity. AdvFS provides greater flexibility by allowing file sets (file systems) to share a single storage pool and enabling hard and soft file set quotas in addition to user and group quotas.

archive

1. To store programs, data files, text files, and other types of files for safekeeping. For instance, the Update Installation Cleanup application provides the option to archive the backup files created by an Update Installation.

2. A repository for such files.

associated product

See layered product

attribute-value pair

The method used to define data in a configuration description file (CDF). A CDF file is organized as groupings of attribute-value pairs. An equal sign ( = ) separates each attribute and its associated value.

See also CDF (Configuration Description File)

available swap space

The amount of swap space not reserved by processes. In contrast, free swap space is everything except for the space actually in use. Available swap space is smaller than free swap space because it takes into account both the space that is in use and any reservations that processes may have made. Free swap space does not take reservations into account.

See also swap space

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B

base operating system

The operating system without any additional third party or layered products installed. All software subsets that are located on the first CD-ROM comprise the base operating system.

Berkeley Internet Name Domain

See BIND (Berkeley Internet Name Domain)

BIND (Berkeley Internet Name Domain)

A distributed database name lookup service that lets you distribute the host database network wide. Also known as Domain Name Service (DNS).

See also BIND client, BIND server

BIND client

A computer that queries a BIND server for host name and host address information, interprets the responses, and passes the information to requesting applications.

See also BIND (Berkeley Internet Name Domain)

BIND server

A computer that is an authoritative source for information about one or more zones. The BIND server either maintains the master copy of the host's database for the zone or obtains the information required to serve the hosts database from another server.

See also BIND (Berkeley Internet Name Domain)

block device

A storage device that supports directory memory access (DMA) rather than character input/output.

block special file

A device special file that provides access to an input or output device and is capable of supporting a file system.

See also device special file

boot time

The time when the operating system is initializing. In the case of a cold boot, the hardware also is initialized.

bootable

Having the ability to load and initialize the operating system

bootp (Bootstrap Protocol)

A protocol that provides a framework for passing configuration information to hosts on a TCP/IP network. The bootp protocol allows a client machine to discover its own IP address, the address of a server host, and the name of a file to be loaded into memory and executed. The bootstrap operation can be thought of as consisting of two phases. The first phase is address determination and bootfile selection and the second phase is file transfer.

Bourne shell

The command interpreter and interpreted programming language originally developed by Steve Bourne.

See also shell

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C

C shell

A command interpreter and interpreted programming language developed at the University of California at Berkeley; so named because many of its constructs resemble the equivalent C language constructs.

See also shell

CDE (Common Desktop Environment)

A graphical user interface for interacting with the operating system. The CDE interface was jointly developed and is based on industry standards, including the X Consortium's X Window System and the Open Software Foundation's Motif interface.

CDE front panel

On systems with graphics capabilities, a centrally located window on the CDE desktop, which contains icons for accessing system management applications and utilities. The Front Panel occupies all desktop workspaces.

CDF (Configuration Description File)

A data file that is used to clone systems. Two separate CDFs store the installation and configuration characteristics of an installed and configured system. Installation information is stored in an install.cdf file, which is created automatically whenever a Full Installation is performed. Configuration information is stored in a config.cdf file, which is created manually using the sysman -clone -save command. Both of these files are located in the /var/adm/smlogs directory by default.

See also installation cloning, configuration cloning

character device

A data storage or transfer device that manipulates data in increments of a single character; for example, a terminal.

character special file

A file through which processes can access either a character-stream oriented I/O interface or an unstructured (raw) device, such as a communication line or an unbuffered magnetic tape or disk.

checksum

A sum of bits or digits used primarily for verification purposes, summed according to an arbitrary set of rules. The checksum verifies the integrity of data.

client

A computer system that uses resources provided by another computer system called a server.

cloning

A process that uses the installation or configuration characteristics in a configuration description file (CDF) generated from one system to create an exact replica on another system.

See also CDF (Configuration Description File)

cluster

A loosely coupled collection of servers that share storage and other resources that make applications and data highly available. A cluster consists of communications media, member systems, peripheral devices, and applications. The systems communicate over a high-performance interconnect.

See also cluster member

cluster member

The basic computing resource in a cluster. A member system physically must be connected to a cluster interconnect and at least one shared SCSI bus. The connection manager dynamically determines cluster membership based on communications among cluster members.

Common Desktop Environment

See CDE (Common Desktop Environment)

conditional mandatory subset

A software subset that is required for the proper function of the operating system only when certain hardware or software is detected during the installation procedure which makes the software mandatory.

See also mandatory software subset

configuration

1. The machines, devices, and programs that make up a data processing system or network.

2. The act of making a subsystem, or a set of subsystems, or services available for use by a running operating system.

3. The set of configured subsystems in an operating system.

configuration cloning

The process that duplicates the configuration from a previously configured system onto one or more target systems, eliminating the need to perform the configuration tasks as a separate operation. Configuration information such as network setup and services, mail setup, printer setup, and internet access can be cloned from one system to another.

See also installation cloning, CDF (Configuration Description File)

configuration description file

See CDF (Configuration Description File)

console mode

When the system is halted, the operating system is no longer running, and the console subsystem is started. This state is also known as console mode and is recognizable by the console mode prompt, which is represented by three right arrow characters (>>>). The console mode prompt is sometimes called triple arrows.

core file

A file that is created when an application terminates abnormally or the system crashes. A core file may be useful to debug a problem with an application or system that crashed, but otherwise, core files should be deleted because they consume a large amount of disk space. A core file is created in the directory from which the application was invoked.

See also crash file

crash file

A file that is created when the system crashes. System crashes may be caused by a hardware malfunction, a kernel failure, a software error, or a variety of other reasons. The core file created by the crash may be useful to debug why the system crashed, but otherwise, core files should be deleted because they consume a large amount of disk space. Additional crash data is stored in the /var/adm/crash directory.

custom partition table

A disk partition table that differs from the recommended partition table. Systems that are shipped with factory installed software (FIS) typically use a custom partition table because of the many layered products that are installed in addition to the base operating system. Customizing a partition table lets you divide a disk in a fashion best suited to your needs.

See also partition table, recommended partition table

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D

Dataless Management Services

See DMS (Dataless Management Services)

DCE (Distributed Computing Environment)

A standard defined by The Open Group for distributed computing that defines a uniform set of services that share certain global properties for common naming, security, time synchronization, system availability, access to data, and system management. DCE enables applications and data on heterogeneous systems to work together.

default

Any value that is set automatically by an application or process.

default partition

1. The partition used by a system as the default boot partition.

2. The physical portion of a disk that is usually assigned by the installation process to hold a specific file system.

See also partition

default file system layout

When the / ( root ) and /usr file systems and a single swap area, swap1, are installed on the same disk in the a, g, and b disk partitions, respectively.

See also file system layout

default partition table

The disk partitions that are defined in the /etc/disktab file or, in the absence of an entry in that file, the disk driver itself. The default partition table varies with disk type because it depends upon the size of the disk itself. The disklabel -p command is used to view a disk's default partition table. Every supported disk has a preset default partition table, but it is not recommended to use it during a Full Installation.

See also partition table

dependent subset

A subset that requires the presence of other subsets in order to function properly. Dependencies between subsets are evaluated by a subset's software control program (SCP), which is controlled by the setld command.

See also subset

device

1. The general name for any peripheral hardware connected to the processor that is capable of receiving, storing, or transmitting data. For example, card readers, line printers, and terminals are record-oriented devices. Magnetic tape devices and disks are examples of mass storage devices. Terminal line interfaces and interprocessor links are examples of communication devices.

2. The files in the /dev directory that are used to access physical devices are themselves sometimes called devices.

device name

The name or address used to access a physical disk. Device names are located in the /dev directory.

device special file

A file used by processes to access hardware devices. For example, a printer is accessed through a device special file.

See also block special file, character special file

disk label

The disk information, usually located in sector 0 (zero), that includes the disk geometry and partition divisions. This information is used by the system disk driver and the boot program to identify a drive, and to determine how to program a drive and where to find the file systems.

See also partition

disk partition

See partition

distribution media

The media that is used to make software kits available for installation. Typical media types on which to distribute software include CD-ROMs, RIS servers, or locally mounted disks.

DMS (Dataless Management Services)

A service provided whereby a server computer system maintains the / ( root ), /usr, and /var file systems for client computer systems connected to the server through a local area network (LAN).

DMS area

A reserved disk area that physically is connected to a DMS server and that contains multiple copies of the DMS root area, one for each registered client.

DMS client

A computer system whose system disk area physically is connected to a DMS server rather than to the client itself and is accessed across the network by the client.

domain

1. Any single element of a domain name. Using host1.nyc.bigcorp.com as an example: nyc.bigcorp.comis the domain and host1 is the unique host name.

2. Any qualified portion of a domain name. Qualified means that it is fully specified all the way to the root domain. Using host1.nyc.bigcorp.com as an example: nyc.bigcorp.com, bigcorp.com, and .com are qualified domains.

3. The domain, and all the subdomains beneath it, down to the leaf nodes of the domain space tree. Using nyc.bigcorp.com as an example: nyc.bigcorp.com is the name of the domain, and the domain encompasses all the hosts located in nyc (New York City).

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E

ed editor

A line-oriented program for modifying the contents of text files. The program operates by accepting commands from the user. For example, issuing the command s/Unix/UNIX/g substitutes each instance of the string Unix on the current line with the string UNIX.

editor

A program for modifying the contents of text files. Full-screen editors, such as vi, use video display terminals to display several lines of the file being manipulated; they allow the user to move the cursor to a specific location and change the text there. Line editors, such as ed, work on a line-by-line basis. Stream editors, such as sed, work by applying commands from a previously prepared list (called a script) instead of by accepting commands from the user.

Emacs

A text editor developed by the Free Software Foundation that is available for all UNIX systems, although it is not a standard part of Berkeley UNIX or System V. It is included with this UNIX operating system.

ex editor

A line-oriented program for modifying the contents of text files. The ex editor is an extended version of the ed editor.

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F

factory installed software

See FIS (Factory Installed Software)

file system

The hierarchical structure of directories and files on a physical or logical mass storage device. The hierarchy starts with the / ( root ) directory. In this UNIX operating system, the standard UNIX file systems are /, /usr, and /var. The /var file system optionally can be created as an area under the /usr file system.

file system layout

The location of the basic UNIX file systems and swap areas: / ( root ), /usr, /var, swap1, and swap2 on one or more disks.

file system type

Defines how a file system is structured and managed. The Full Installation process offers the Advanced File System (AdvFS) and UNIX File System (UFS) as supported file system types.

See also AdvFS (Advanced File System), UFS (UNIX File System)

file type conflict

When the Update Installation process finds a file type that is different from the file type as it was shipped in the previous version of the operating system. A file type conflict occurs when the file type of a file, directory, symbolic link, block device, or pipe was modified from the file type originally shipped. The Update Installation cannot install the new file type without overwriting the modified file type. This feature preserves the integrity of the software to be updated.

firmware

The software stored in silicon (for example, ROM or EPROM) on a system's CPU board. Firmware is also known as console code. Firmware is the first software that runs when a system is turned on, and it directly controls all hardware. Each hardware platform uses a different set of firmware. The firmware on a platform is the same regardless of the operating system installed on the platform. Thus, firmware is platform dependent, but is not operating system independent.

FIS (Factory Installed Software)

A process that preinstalls the operating system at the factory before a system is shipped from the manufacturing facility. Typically, FIS systems are installed with all mandatory and all optional operating system software and a variety of layered products. Included in the box with the preinstalled system is the Factory Installed Software Information Sheet, which describes the software products that have been installed and the disks and disk partitions that were used for the file system layout.

full installation

The process by which a brand new version of the operating system is installed onto a system. A Full Installation creates new file systems and swap space and overwrites existing system and user-created files on the disk partitions where the new file systems and swap spaces are to be installed. After the Full Installation, the system must be configured for general use.

fully qualified host name

A host name containing one or more labels separated by a period that uniquely defines a computer. A label is a string which begins with a letter and contains letters, digits, and hyphens and ends with a letter or a digit. A label can have between 2 and 63 characters, inclusive. A fully qualified host name can have a maximum of 254 characters. For example, host1.nyc.bigcorp.com is a fully qualified host name.

See also domain

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G

generic kernel

The kernel image that includes kernel support for all system types, devices, and software options. The generic kernel file, /genvmunix, can be booted if the tailored kernel, /vmunix, is damaged.

See also tailored kernel

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H

halt

A type of system shut down that stops the processor but does not reboot the system. When the system is halted, the operating system is no longer running, and the console subsystem is started. This state is also known as console mode and is recognizable by the console mode prompt, which is represented by three right arrow characters (>>>). A system can be halted by using the shutdown -h now command.

host

1. The primary or controlling computer in a communications network.

2. Any computer system attached to a network.

host name

The name given to a computer. Lowercase and uppercase letters (a-z and A-Z), numbers (0-9), periods, and dashes are permitted in host names. Valid host names contain from 2 to 63 characters with the first character being a letter.

HTML (HyperText Markup Language)

The coding (markup) inserted in a file intended for display on a World Wide Web browser that tells the browser how to display the words on a web page. The markup is done with tags, which are command words enclosed in angle brackets. For example, the tag <P> creates a new paragraph; the tag <TABLE> begins the formatting of a table. Although the World Wide Web Consortium (W3C) promotes the standardization of HTML, both Netscape and Microsoft browsers currently implement some features differently and provide nonstandard extensions.

HyperText Markup Language

See HTML (HyperText Markup Language)

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I

i18n

The abbreviation for internationalization. Worldwide Language Support (WLS) software is installed in the /usr/i18n directory, which can be created as its own file system or can be created as a symbolic link to another file system.

See also WLS (Worldwide Language Support)

init

The command issued as the final step in the boot procedure. The init command initializes the system by creating and controlling processes. The processes run by the init command at each run level are defined in the /etc/inittab file.

init process

The root process created by the system that performs system administration tasks, such as spawning login processes and handling the orderly shutdown from multiuser to single-user mode.

inode

The internal structure that describes the individual files in the operating system. There is one inode for each file. An inode contains the node, type, owner, and location of a file. A table of inodes is stored in strategic locations of a file system.

inode number

A number specifying a particular inode file in the file system.

installation cloning

The process that duplicates the installation characteristics (that is, disk selection, file system layout, and installed software) from an installed system onto one or more systems with the same or similar hardware configuration. Installation cloning is performed directly from a Full Installation.

See also CDF (Configuration Description File)

internet address

A unique 32-bit number that identifies a host's connection to an internet network. An internet address consists of a network number and a host number.

Internet Protocol

See IP (Internet Protocol)

IP (Internet Protocol)

The network layer protocol for the Internet protocol suite that provides the basis for the connectionless, best-effort packet delivery service. IP includes the Internet Control Message Protocol (ICMP) as an integral part. The Internet protocol suite is referred to as TCP/IP because IP is one of the two most fundamental protocols.

IP address

A 32-bit quantity used to represent a point of attachment in an Internet. Periods (.) delineate each portion of the address.

See also IP (Internet Protocol)

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K

kernel

The core part of the operating system that controls processes, system scheduling, memory management, input and output services, device management, network communications, and the organization of the file systems.

Korn shell

A command interpreter and interpreted programming language developed by David Korn. The Korn shell (ksh) is semantically an extended version of the Bourne shell, with constructs and commands to implement enhanced features, including job control and command history recall. The POSIX shell is a superset of the Korn shell.

See also shell

ksh

The command that invokes the Korn shell; the name of the executable file that is the shell.

See also Korn shell, shell

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L

LAN (Local Area Network)

A group of two or more computer systems (hosts) connected by a transmission medium, such as an Ethernet cable, token ring, or FDDI. Each host is connected to the transmission medium by a hardware interface. A LAN is a data communications network that spans a physically limited area, such as a single office building. It usually is owned by the organization it services and provides high-bandwidth communication over inexpensive media.

See also network

layered product

A software product that is compatible with the operating system but is not part of the base operating system. A layered software product is installed, or layered, along with the operating system. Layered software products are often shipped on the Associated Products compact discs (CD-ROMs) that can accompany a new release of the operating system. In most cases, layered software products are installed from the SysMan Menu or by using the setld command.

See also base operating system, setld, SysMan Menu

local area network

See LAN (Local Area Network)

log in

To begin using a computer system, usually by entering a login name and password to gain access to and communicate with the operating system as an authorized user.

Logical Storage Manager

See LSM (Logical Storage Manager)

LSM (Logical Storage Manager)

LSM is an integrated, host-based disk storage management tool that protects against data loss, improves disk input/output performance, and customizes the disk configuration. LSM builds virtual disks, called volumes, on top of UNIX disks. A volume is a special device that contains data used by file systems, databases, or other applications. LSM transparently places a volume between a physical disk and an application, which then operates on the volume rather than on the physical disk.

LSM private region

The disk partition that contains LSM configuration information for the entire system. Multiple private regions on multiple disks provide backup functionality in the unlikely event of a disk failure. The LSM private region requires 2 MB of disk space.

See also LSM (Logical Storage Manager)

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M

mandatory kernel component

That portion of the kernel that is required for the proper operation of the base operating system.

See also optional kernel component, base operating system

mandatory software subset

A portion of software that is the minimum required to install and run a software product.

See also base operating system, optional software subset

merge file

A program used by the Update Installation process to automatically merge new functionality from the new version of the operating system into an existing customized file.

See also protected system file, .PreMRG file

mount

A command that attaches a file system to an existing directory to make the file system available for use.

See also unmount

mount point

A directory that is the name of a mounted file system.

multiprocessor

A system with two or more processors sharing common physical memory.

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N

name service

The service provided to client processes for identifying peer processes for communications purposes.

network

Two or more computing systems that are linked for the purpose of exchanging information and sharing resources.

Network File System

See NFS (Network File System)

.new.. file

A system file with this prefix allows a new version of a protected system file be delivered to the system during an Update Installation without overwriting the existing, and possibly customized version of the file.

See also protected system file, .proto.. file

NFS (Network File System)

A service that allows a system (the server) to make file systems available across a network for mounting by other systems (clients). When a client mounts an NFS file system, the client's users see the file system as if it were local to the client.

NFS mounted

Refers to a file system that is mounted over a network by NFS rather than being physically connected (local) to the system on which it is mounted.

See also NFS (Network File System)

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O

obsolete files

Files that were shipped in a previous version of the operating system that are no longer shipped with the current version of the operating system. Removing obsolete files does no harm to the operating system and helps save disk space.

optional kernel component

A portion of the kernel that is not required for the proper operation of the mandatory portions of the base operating system but may be required for the proper operation of optional portions of the operating system or layered software products. Optional kernel components may also provide some additional functionality required by a user (for instance, the Packet Filter Driver).

See also base operating system, kernel, layered product

optional software subset

A variety of software applications that can be installed to enhance the base operating system but are not required for the proper operation of the operating system. A prime example of optional software subsets are the UNIX reference pages; they are not required, but are a useful addition.

See also base operating system, mandatory software subset

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P

page

A fixed-size unit of physical memory.

partition

The physical portions of a disk that are named a through h. Disks are divided into sections that are then assigned to hold various file systems. By convention, the / ( root ) file system is always located on the first partition, named a. The /usr file system is on a different partition, often the g partition. The c partition usually represents the entire disk. Each partition may differ in size and can overlap other partitions. Two overlapping partitions cannot be used at the same time. Disks can have up to eight partitions. Partitions are sometimes known as slices.

partition table

The component of a disk label that specifies how a physical disk is divided or partitioned.

password

A string of characters that in conjunction with other information, such as the login name, uniquely confirms a user's identity to the system. Passwords should contain a combination of upper and lower case letters, numbers, and special characters and must be a minimum of six to a maximum of 16 characters in length.

path

An ordered list of the directories in which the shell searches for the executable files named by commands that are not entered with a pathname and are not shell built-in commands.

pathname

The name of a file, concatenated onto a list of the directories through which access to that file is achieved; hence, the complete name of the file. Absolute pathnames begin at the root directory and are written with an initial slash (for example, /usr/users/rolf/myfile.txt). Relative pathnames begin at the user's working directory and are written without the initial slash (for example, rolf/myfile.txt).

PostScript

The registered trademark for a language developed by Adobe Systems, Inc., for specifying the formatting of typeset documents or displays. An encapsulated PostScript file is a file that follows a standard for embedding PostScript files into other PostScript files.

.PreMRG file

A backup copy of a protected system file as it existed before an Update Installation. These files are appended with a .PreMRG extension. If any system file customizations were not successfully merged, refer to the *.PreMRG version of the file to include those customizations in the postmerged file on the updated system.

See also protected system file

.PreUPD file

A backup copy of an unprotected customized file. Before an Update Installation takes place, unprotected system files that are found to have been customized are copied and saved to the same file name with a .PreUPD extension. If you have customized these files in any way, you must manually add the customizations into the new version of the system file when the Update Installation is complete.

See also unprotected system file

protected system file

A customized system file whose customizations are automatically merged into the new version of the file on the updated system. A merge is performed only when the file has been previously customized by the user or the file has been modified by Compaq. The Update Installation process creates a backup *.PreMRG file for reference purposes in case of a merge failure. Protected system files are system files that are expected to be customized, for example, /etc/passwd and /etc/host.

See also .PreMRG file

.proto.. file

A file that is modified to deliver site-wide customizations of system files to DMS client systems. Performing this customization before registering clients to the DMS environment reduces the amount of customization required at each client. There are several files with .proto.. extensions located in the DMS environment /var/adm/dms/dmsN.alpha in the /etc, /bin, /var/adm/X11, and / directories that can be modified.

See also DMS (Dataless Management Services)

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Q

Quick Setup

A system management application that lets you configure basic licensing, networking, printing, and mail services. The Quick Setup application is accessed from the System Setup checklist by entering /usr/sbin/checklist on the command line.

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R

reboot

Brings the system down to console mode and restarts the operating system.

recommended partition table

The way a disk is partitioned by the Full Installation process when the recommended file system layout is used. The recommended partition table is designed to hold the entire operating system and allow room on the disk for some additional software as well as enough extra space for future Update Installations. For a typical single disk installation, the recommended partition table is:

See also default file system layout, partition table

reference page

One of a collection of files containing documentation on all commands, system calls, library routines, and so forth. Reference pages are often called manual pages or man pages.

RIS (Remote Installation Services)

An application for installing software kits across a network instead of using locally mounted distribution media. If the RIS software subset is installed, the RIS application is invoked by entering /usr/sbin/ris.

See also network, RIS (Remote Installation Services)

RIS area

A reserved disk area physically connected to a RIS server, containing one or more installable software kits.

See also RIS (Remote Installation Services)

RIS client

A computer system that has permission to install software across the network by accessing kits stored in the server's RIS area. Client systems are registered on the RIS server to software kits through the use of the RIS application.

See also RIS (Remote Installation Services)

RIS server

A computer system that serves other computers by providing software kits for them to install. The software is stored on disks belonging to the server and is accessed across the network by the RIS clients.

See also RIS (Remote Installation Services)

root

1. The login name for the superuser (system administrator).

See also superuser

2. The name applied to the topmost directory in the UNIX system's tree-like file structure; hence, the beginning of an absolute pathname. The root directory is represented in pathnames by an initial slash (/); a reference to the root directory itself consists of a single slash.

See also superuser, pathname

root directory

See root

root file system

The topmost file system under which all other file systems are mounted. The root file system contains the operating system files that get the rest of the system running.

root login

See root

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S

script

1. A nonbinary program that is interpreted and executed by a specified shell.

2. In the sed editor, a list of editing commands to be applied to the input file.

SCSI (Small Computer System Interface)

An industry-standard bus for small systems such as personal computers, small multiuser systems, or workstations. SCSI-based devices can be configured in a series with multiple devices on the same bus.

server

A computer system that provides software or services to one or more other computers called clients.

See also client

setld

A command used for installing, managing, and removing software subsets on a system that is already running the operating system.

See also subset

sh

The command that invokes either the Bourne shell.

shell

A program that interprets commands entered by the user, invoking programs and calling for system resources as needed.

See also Bourne shell, C shell, Korn shell

single-user mode

An operating system mode that prohibits user logins, stops system services and daemons (for networking and graphical windowing environments), stops any running processes, and unmounts file systems.

su

A command that substitutes another user's login for that of the user who invoked the command, logging in the invoking user under the substituted login. The invoking user must know the login password for the user whose login is being substituted. If no other user's login is specified, the command substitutes the root login.

subset

A software kit module that is installed or removed with the setld command. A subset usually consists of a collection of related files, such as an application and its support files.

See also setld

subset dependency

The condition in which a given subset requires the presence, or lack thereof, of other subsets in order to function properly. Dependencies between subsets is evaluated by a subset control program (SCP) under control of the setld command.

superuser

A user possessing privileges to override the normal restrictions on file access, process control, and so forth. A user who possesses these privileges becomes a superuser by issuing the su command, or by logging into the system as the user root.

swap space

Disk space used to hold modified memory from an idle or low priority process in order to reclaim the physical memory that the process is using.

symbolic link

A file that contains the pathname of another file or directory and acts as a pointer to that file or directory. The symbolic link can occur within the same file system or across file systems; also called a soft link or sym link.

SysMan Menu

A menu of system management tasks organized in a tree-like hierarchy with branches of general functionality and leaves for actual tasks. Selecting a leaf opens a dialog for performing the task. Depending on the user's display device, the SysMan Menu provides either a graphical or text-based interface. The SysMan Menu is invoked from the command line by entering /usr/sbin/sysman or from the CDE Application Manager if your system is running the CDE desktop.

system disk

The disk containing the / ( root ) file system is sometimes known as the system disk.

system file

A file that is resident on a system after an installation, which contains information that is important for the proper operation of the operating system.

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T

tailored kernel

The kernel image that is created for a system, which includes specific support for the hardware and software options installed on the system. A tailored kernel is automatically built for the system at the end of the installation process by the /usr/sbin/doconfig program, and includes mandatory only, all, or customized kernel components as part of the tailored kernel build.

See also kernel

tar (tape archive)

A command that makes portable copies of files for archiving or transfer to another system. By default, the tar command writes its archive files on the system's primary magnetic tape unit.

target system

In the cloning process, the system that is to be cloned from another system.

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U

UFS (UNIX File System)

The standard file system type that is characterized by a hierarchical structure, the ability to create and delete files, dynamic growth of files, protection of file data, and the treatment of peripheral devices.

See also AdvFS (Advanced File System), file system

UNIX file system

See UFS (UNIX File System)

UNIX shell

An option that is offered during a Full Installation as a way to access the standard UNIX command line interface. Its primary purpose is to provide a way to perform disk and file system maintenance before or during a Full Installation. The UNIX shell provides a way to access all UNIX commands that help you recover from serious problems such as / ( root ) file system corruption and enables you to perform general file system and disk maintenance tasks.

unmount

The process that announces to the system that a file system previously mounted on a specified directory is to be removed. Only the person who mounted the particular file system or a superuser can unmount it. A file system is unmounted with the umount command.

See also mount

unprotected system file

A customized system file, usually binary, whose customizations are not merged automatically into the new version of the file on the updated system. Customizations are preserved in a file with a *.PreUPD extension. If unprotected system files are altered in any way, customizations must be merged manually into the new version of the system file when the Update Installation is complete by using the *.PreUPD version as a guide. Unprotected system files are system files that are not expected to be customized by a user, for example, /usr/bin/X11/netscape.

See also .PreUPD file

update installation

Updates a system running a previous version of the operating system to a more recent released version of the operating system. An Update Installation preserves disk partitions, file systems, file customizations, network and print environment, user accounts, user created files, and any other system setup that may have been done on the system.

URL (Uniform Resource Locator)

The address of a file or other resource accessible on the Internet. The type of file or resource depends on the Internet application protocol. For example, using the HyperText Transfer Protocol (HTTP), the file can be an HTML page, an image file, or a program such as a CGI application or Java applet. Such an address would look like this: http://www.unix.digital.com, which is the URL for the Compaq UNIX Web site.

user-supplied file

A file that is searched for and executed during a Full or Update Installation. User-supplied files can be used to extend the installation process by applying customizations either before, during, or after the installation. The file can contain scripts, executables, or programs. The Full Installation and Update Installation processes always look for these files, and if the files are properly named and are put in the right location, they are executed when found.

/usr

A file system in which some components of the operating system and applications are stored. Users' home directories are sometimes also located in a subdirectory of /usr.

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V

version

The number assigned to a particular release of the base operating system or to layered software products.

See also base operating system, layered product

vi editor

A full-screen text editor. The vi editor is a modal editor. In command mode, it accepts commands for cursor movement, text deletion, and so forth. To insert text into the file, the user gives the editor a command that places the editor in input mode, and all keystrokes thereafter are interpreted as input data until the Escape key is pressed.

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W

WLS (Worldwide Language Support)

The set of software subsets that provide support for various native languages and countries. Installing WLS software subsets enables software developers to develop internationalized software and lets users work in their native language.

Worldwide Language Support

See WLS (Worldwide Language Support)